An impeller detection method in a centralized smoke exhaust system of a building

Abstract

The invention relates to an impeller detection method in a building centralized smoke exhaust system, which is characterized in that it includes: step 1, the user chooses to shut down the indoor range hood after using it, and if necessary, enters the indoor impeller self-inspection. When the angle-adjusting electric check valve is closed, it will operate in the constant speed mode at the first preset speed Ni, collect the bus current value of the indoor motor for k times, sort the speed of the indoor fan for k times, select the maximum and minimum values, and calculate The average value, select the value with a large deviation, record it as mi, and compare mi with the bus current fluctuation thresholds ma and mb, in different gears for r1 consecutive times, if ma<mi≤mb, determine the corresponding indoor range hood The accumulation of oil dirt on the indoor impeller will cause eccentricity and load imbalance of the indoor impeller. Compared with the prior art, the impeller detection method provided by the invention can draw more accurate judgment conclusions.

Description

technical field [0001] The invention relates to an impeller detection method in a building centralized smoke exhaust system. Background technique [0002] At present, most of the range hoods used in the kitchens of houses and apartments are independent. Holes in the windows or walls are used to set the exhaust port of the range hood. The oil fume is discharged directly from the outer wall, which will cause pollution interference to the residents on the upper and lower floors, and will cause oil pollution to the outer wall. At the same time, it will also affect the overall appearance of the building. [0003] With the high-speed development of economy, more and more high-rise residential buildings have sprung up like mushrooms after rain. In order to maintain the appearance and image of the entire building, in many high-rise residential buildings, a centralized smoke exhaust system for the building will be adopted for centralized smoke exhaust. The public flue, the outdoor ...

AI Technical Summary

Problems solved by technology

[0004] In recent years, the air outlet of the user-side indoor range hood is connected to the public flue through an adjustable angle valve. The outdoor main fan system is equipped with a centralized filtration system, which has begun to be used in some well-decorated buildings. The outdoor main fan system is aimed at different indoor The operating rate of the range hood is controlled by frequency conversion, or the flow distribution is realized by adjusting the angle of the adjustable angle valve on different floors; in the centralized smoke exhaust system of the building, the outdoor main fan system and the indoor range hood are often equipped with impellers. Therefore, the separation degree of grease can be effectively improved, but after a certain period of use, since indoor range hoods and outdoor main fan systems are mostly installed vertically with radial fans, and the impellers are generally installed vertically, the accumulation of oil stains on the lower part of the impellers will be biased. And when the range hood is turned off, the separated grease will stay in the lower part of the impeller, which will intensify the accumulation of oil, which will lead to the eccentricity of the impeller and the unbalanced load.

At present, only regular cleaning and maintenance of the impeller can be used in the market to alleviate the eccentricity and load imbalance of the impeller.

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